Chief Meteorologist Brad Panovich said flash flooding will continue to be a huge threat through Sunday afternoon as the slow-moving storm creeps toward the mountains of western North Carolina.

"If it sits for six hours, some areas could see two, four, maybe five inches on top of the three-to-six inches of rain we saw in the past 24 hours," Panovich said.

As of 9:20 a.m. Sunday, Duke Energy reported over 16,000 outages in Mecklenburg County. A Flash Flood Warning is in effect in Mecklenburg County until 1:30 p.m. In total, over 413,000 Duke Energy customers are without power due to the storm.

Even before Florence reached the Queen City, several neighborhoods reported trees toppling due to the wind. Now, trees will likely fall victim to oversaturated ground and flash flooding. Downed trees could lead to even more power outages through Sunday night and into Monday. Panovich said wind gusts Sunday could reach 40-50 mph in some areas as a Wind Advisory is in effect until 8 p.m. Sunday.

Window out in a 'Helping the Orphan' thrift store in Fayetteville. Credit: Clay Gordon

SUV underwater in New Bern, NC. Credit: Rachel Roller

Massive tree down in Charlotte off of Sharon Road. Credit: Kendall Morris

Photo: Carrie Pressley

Photo: Jason Houck , Emerald Isle

ATLANTIC BEACH, NC - SEPTEMBER 13: Waves crash underneath the Oceana Pier as the outer bands of Hurricane Florence being to affect the coast September 13, 2018 in Atlantic Beach, United States. (Photo by Chip Somodevilla/Getty Images)

PHOTO: Tim Fitch

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Indian Trail

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Fort Mill

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Fort Mill

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Fort Mill

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Revolution Park

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Indian Trail

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Statesville

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Statesville

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Statesville

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Briar Creek

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Providence Plantation

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Mint Hill

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Near Bojangles Coliseum

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McMullen Creek

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Carolina Golf Club

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Carolina Golf Club

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Carolina Golf Club

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Near Bojangles Coliseum

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Myers Park. Photo by Xavier Walton.

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Myers Park. Photo by Xavier Walton.

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Myers Park. Photo by Xavier Walton.

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A fallen tree in Waxhaw, NC. Photo: Ron McLauchlin

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Indian Land, SC. Photo by Bob Hager.

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Matt Toadvine, of Mint Hill

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Brian Wells, of Matthews

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A downed tree in Charlotte (Photo: Katie Wagner)

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A downed tree in Charlotte (Photo: Katie Wagner)

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A massive tree split and fell on multiple homes on Howard Street in north Charlotte on Saturday, September 15, 2018. Fortunately, no one was injured.

Window out in a 'Helping the Orphan' thrift store in Fayetteville. Credit: Clay Gordon

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SUV underwater in New Bern, NC. Credit: Rachel Roller

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Massive tree down in Charlotte off of Sharon Road. Credit: Kendall Morris

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Photo: Carrie Pressley

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Photo: Jason Houck , Emerald Isle

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ATLANTIC BEACH, NC - SEPTEMBER 13: Waves crash underneath the Oceana Pier as the outer bands of Hurricane Florence being to affect the coast September 13, 2018 in Atlantic Beach, United States. (Photo by Chip Somodevilla/Getty Images)

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PHOTO: Tim Fitch

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“This is a big house and just a bigger tree has completely covered it, so it’s really scary,” said Kelly Lolli, who lives close by.

On Saturday a tree fell on a home in Rock Hill. Officials said the home has major damage. JUST IN from Rock Hill Fire Department. Major damage to a home on Ebenezer Rd. after this massive tree fell overnight.

A few blocks away in Myers Park, a large tree fell across a cul-de-sac onto a car. Anshuman Mandal, who lives in the cul-de-sac, said the car belonged to a friend who was staying with him.

Mandal said everyone in the household moved their cars to the cul-de-sac the night before because they were worried a different tree nearby would fall.

“You never know what’s going to happen,” Mandal said. “This tree, we never expected it to come down.”

Another tree in the neighborhood split off close to several homes but didn’t cause any damage. Tree removal crews were out clearing the road from any downed limbs Friday evening.

“Glad that this one was removed,” Tripp Rudisill, who lives close by, said, “but hopefully there won’t be any more that this happens to.”

Across the area, a woman reports a tree falling onto her home in Concord. The wind sent a tree toppling into power lines in the Whitesville Park neighborhood in Fort Mill. A downed tree caused power outage and a power pole to snap in the Ballantyne area.